Reef
both
Level 5/10

Cobblestones

East Sumbawa, Indonesia
🪸Sharp reef

Cobblestones is a small channel break near Lakey Peak in East Sumbawa, offering both lefts and rights on a compact reef. The wave provides a fun option when the main breaks are too crowded or too big, with shorter rides and a more relaxed atmosphere. It's one of several satellite breaks in the Hu'u area that extends the surfable options beyond the famous Lakey Peak and Lakey Pipe.

10-Day Forecast
Today
21
70
Good
1.4m
@14s
14km/h
Mon
22
87
Firing
1.3m
@15s
12km/h
Tue
23
89
Firing
1.4m
@15s
13km/h
Wed
24
100
Epic
1.5m
@15s
14km/h
Thu
25
93
Firing
1.3m
@15s
13km/h
Fri
26
75
Good
1.0m
@14s
12km/h
Sat
27
82
Firing
1.1m
@17s
12km/h
Sun
28
87
Firing
2.2m
@17s
11km/h
Mon
29
70
Good
3.1m
@16s
9km/h
Tue
30
78
Good
2.6m
@15s
10km/h

Today's Conditions

Find Flights
Swell
1.4m
S(169°)
Score: 17/25
Period
14s
Long period groundswell
Score: 25/25
Wind
14km/h
E(91°)
Score: 24/25
Weather
25°C
0.3mm46%
Windswell Component
0.6mE@3s
Secondary Swell
0.9mSW
Forecast Confidence
100%
Sources: open-meteo-marine, open-meteo-weather
Best Session
morning
AM: 8 km/h E|PM: 14 km/h E
8 km/h vs 14 km/h afternoon
Tide at 8am (-0.3m)

Location & Conditions

Loading map...
0°45°90°135°180°225°270°315°NESW
Swell
Wind
View in OpenStreetMap
Showing forecast for today

Tide Times

2:03 am
High tide - 1.34m
8:00 am
Low tide - -0.28m
2:03 pm
High tide - 1.33m
8:21 pm
Low tide - -0.51m
Times shown in spot-local time.

Strike Score Breakdown

70
Good
Components
Swell Direction6/25
Swell Size17/25
Swell Period25/25
Wind24/25
Raw Score72/100
Adjustments
🌊💨 Windswell-3
🌊 Tide+1
Adjusted Score70/100
Confidence
Multiplier×1.00
Final Score70
🌊 Partly in the tide window👥 Semester Break
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Spot Details

Swell Requirements

Optimal direction
SW (215°)
Direction range
200° - 230°
Size range
0.9m - 1.8m
Ideal size
1.6m
Height multiplier
1.03×
Ideal period
14s+

Wind Requirements

Optimal direction
E (90°)
Offshore range
60° - 120°

Tide Requirements

Optimal tide
mid
Optimal range
0.5m - 1.5m

Water temp

28°C

Wetsuit

Boardshorts / Rashguard

Difficulty

5/10

Crowd level

4/10

👥 Semester Break (Jun 20Jul 12) — expect extra crowds

Best Season

Peak: Apr-Oct

Secondary: Nov, Dec, Jan, Feb, Mar

Best Apr-Oct (dry season, SE trades offshore). Swells year-round but wet season brings onshore winds.

Getting There

Airport
BMU
Drive time
30 min
Data quality
community

Strike Log

Community Discussion